2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 * Copyright (C) 2013 Intel Corporation. All rights reserved.
7 * Copyright (C) 2014 Marvell International Ltd.
9 * Written by Ilan Elias <ilane@ti.com>
12 * This file is based on hci_core.h, which was written
13 * by Maxim Krasnyansky.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License version 2
17 * as published by the Free Software Foundation
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
32 #include <linux/interrupt.h>
33 #include <linux/skbuff.h>
35 #include <net/nfc/nfc.h>
36 #include <net/nfc/nci.h>
38 /* NCI device flags */
46 /* NCI device states */
50 NCI_W4_ALL_DISCOVERIES,
58 #define NCI_RESET_TIMEOUT 5000
59 #define NCI_INIT_TIMEOUT 5000
60 #define NCI_SET_CONFIG_TIMEOUT 5000
61 #define NCI_RF_DISC_TIMEOUT 5000
62 #define NCI_RF_DISC_SELECT_TIMEOUT 5000
63 #define NCI_RF_DEACTIVATE_TIMEOUT 30000
64 #define NCI_CMD_TIMEOUT 5000
65 #define NCI_DATA_TIMEOUT 700
71 int (*rsp)(struct nci_dev *dev, struct sk_buff *skb);
72 int (*ntf)(struct nci_dev *dev, struct sk_buff *skb);
76 int (*init)(struct nci_dev *ndev);
77 int (*open)(struct nci_dev *ndev);
78 int (*close)(struct nci_dev *ndev);
79 int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
80 int (*setup)(struct nci_dev *ndev);
81 int (*fw_download)(struct nci_dev *ndev, const char *firmware_name);
82 __u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol);
83 int (*discover_se)(struct nci_dev *ndev);
84 int (*disable_se)(struct nci_dev *ndev, u32 se_idx);
85 int (*enable_se)(struct nci_dev *ndev, u32 se_idx);
86 int (*se_io)(struct nci_dev *ndev, u32 se_idx,
87 u8 *apdu, size_t apdu_length,
88 se_io_cb_t cb, void *cb_context);
89 int (*hci_load_session)(struct nci_dev *ndev);
90 void (*hci_event_received)(struct nci_dev *ndev, u8 pipe, u8 event,
92 void (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd,
95 struct nci_prop_ops *prop_ops;
99 #define NCI_MAX_SUPPORTED_RF_INTERFACES 4
100 #define NCI_MAX_DISCOVERED_TARGETS 10
101 #define NCI_MAX_NUM_NFCEE 255
102 #define NCI_MAX_CONN_ID 7
103 #define NCI_MAX_PROPRIETARY_CMD 64
105 struct nci_conn_info {
106 struct list_head list;
107 __u8 id; /* can be an RF Discovery ID or an NFCEE ID */
109 __u8 max_pkt_payload_len;
111 atomic_t credits_cnt;
112 __u8 initial_num_credits;
114 data_exchange_cb_t data_exchange_cb;
115 void *data_exchange_cb_context;
117 struct sk_buff *rx_skb;
120 #define NCI_INVALID_CONN_ID 0x80
122 #define NCI_HCI_ANY_OPEN_PIPE 0x03
125 #define NCI_HCI_ADMIN_GATE 0x00
126 #define NCI_HCI_LINK_MGMT_GATE 0x06
129 #define NCI_HCI_LINK_MGMT_PIPE 0x00
130 #define NCI_HCI_ADMIN_PIPE 0x01
132 /* Generic responses */
133 #define NCI_HCI_ANY_OK 0x00
134 #define NCI_HCI_ANY_E_NOT_CONNECTED 0x01
135 #define NCI_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02
136 #define NCI_HCI_ANY_E_NOK 0x03
137 #define NCI_HCI_ANY_E_PIPES_FULL 0x04
138 #define NCI_HCI_ANY_E_REG_PAR_UNKNOWN 0x05
139 #define NCI_HCI_ANY_E_PIPE_NOT_OPENED 0x06
140 #define NCI_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07
141 #define NCI_HCI_ANY_E_INHIBITED 0x08
142 #define NCI_HCI_ANY_E_TIMEOUT 0x09
143 #define NCI_HCI_ANY_E_REG_ACCESS_DENIED 0x0a
144 #define NCI_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b
146 #define NCI_HCI_DO_NOT_OPEN_PIPE 0x81
147 #define NCI_HCI_INVALID_PIPE 0x80
148 #define NCI_HCI_INVALID_GATE 0xFF
149 #define NCI_HCI_INVALID_HOST 0x80
151 #define NCI_HCI_MAX_CUSTOM_GATES 50
153 * According to specification 102 622 chapter 4.4 Pipes,
154 * the pipe identifier is 7 bits long.
156 #define NCI_HCI_MAX_PIPES 127
158 struct nci_hci_gate {
164 struct nci_hci_pipe {
169 struct nci_hci_init_data {
171 struct nci_hci_gate gates[NCI_HCI_MAX_CUSTOM_GATES];
175 #define NCI_HCI_MAX_GATES 256
179 struct nci_dev *ndev;
180 struct nci_conn_info *conn_info;
182 struct nci_hci_init_data init_data;
183 struct nci_hci_pipe pipes[NCI_HCI_MAX_PIPES];
184 u8 gate2pipe[NCI_HCI_MAX_GATES];
188 struct sk_buff_head rx_hcp_frags;
189 struct work_struct msg_rx_work;
190 struct sk_buff_head msg_rx_queue;
193 /* NCI Core structures */
195 struct nfc_dev *nfc_dev;
197 struct nci_hci_dev *hci_dev;
208 struct list_head conn_info_list;
209 struct nci_conn_info *rf_conn_info;
211 struct timer_list cmd_timer;
212 struct timer_list data_timer;
214 struct workqueue_struct *cmd_wq;
215 struct work_struct cmd_work;
217 struct workqueue_struct *rx_wq;
218 struct work_struct rx_work;
220 struct workqueue_struct *tx_wq;
221 struct work_struct tx_work;
223 struct sk_buff_head cmd_q;
224 struct sk_buff_head rx_q;
225 struct sk_buff_head tx_q;
227 struct mutex req_lock;
228 struct completion req_completion;
235 __u32 target_active_prot;
237 struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
240 /* received during NCI_OP_CORE_RESET_RSP */
243 /* received during NCI_OP_CORE_INIT_RSP */
245 __u8 num_supported_rf_interfaces;
246 __u8 supported_rf_interfaces
247 [NCI_MAX_SUPPORTED_RF_INTERFACES];
248 __u8 max_logical_connections;
249 __u16 max_routing_table_size;
250 __u8 max_ctrl_pkt_payload_len;
251 __u16 max_size_for_large_params;
253 __u32 manufact_specific_info;
255 /* Save RF Discovery ID or NFCEE ID under conn_create */
258 /* stored during nci_data_exchange */
259 struct sk_buff *rx_data_reassembly;
261 /* stored during intf_activated_ntf */
262 __u8 remote_gb[NFC_MAX_GT_LEN];
266 /* ----- NCI Devices ----- */
267 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
268 __u32 supported_protocols,
271 void nci_free_device(struct nci_dev *ndev);
272 int nci_register_device(struct nci_dev *ndev);
273 void nci_unregister_device(struct nci_dev *ndev);
274 int nci_request(struct nci_dev *ndev,
275 void (*req)(struct nci_dev *ndev,
277 unsigned long opt, __u32 timeout);
278 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
279 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
281 int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
282 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
283 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
284 u8 number_destination_params,
286 struct core_conn_create_dest_spec_params *params);
287 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
289 struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
290 int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
291 const u8 *param, size_t param_len);
292 int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate,
293 u8 cmd, const u8 *param, size_t param_len,
294 struct sk_buff **skb);
295 int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe);
296 int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host,
297 u8 dest_gate, u8 pipe);
298 int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
299 const u8 *param, size_t param_len);
300 int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
301 struct sk_buff **skb);
302 int nci_hci_dev_session_init(struct nci_dev *ndev);
304 static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
310 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
312 skb_reserve(skb, ndev->tx_headroom);
317 static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
319 nfc_set_parent_dev(ndev->nfc_dev, dev);
322 static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
324 ndev->driver_data = data;
327 static inline void *nci_get_drvdata(struct nci_dev *ndev)
329 return ndev->driver_data;
332 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
333 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
334 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
335 struct sk_buff *skb);
336 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
337 struct sk_buff *skb);
338 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
339 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
340 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
341 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
342 __u8 conn_id, int err);
343 void nci_hci_data_received_cb(void *context, struct sk_buff *skb, int err);
345 void nci_clear_target_list(struct nci_dev *ndev);
347 /* ----- NCI requests ----- */
348 #define NCI_REQ_DONE 0
349 #define NCI_REQ_PEND 1
350 #define NCI_REQ_CANCELED 2
352 void nci_req_complete(struct nci_dev *ndev, int result);
353 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
356 /* ----- NCI status code ----- */
357 int nci_to_errno(__u8 code);
359 /* ----- NCI over SPI acknowledge modes ----- */
360 #define NCI_SPI_CRC_DISABLED 0x00
361 #define NCI_SPI_CRC_ENABLED 0x01
363 /* ----- NCI SPI structures ----- */
365 struct nci_dev *ndev;
366 struct spi_device *spi;
368 unsigned int xfer_udelay; /* microseconds delay between
372 struct completion req_completion;
376 /* ----- NCI SPI ----- */
377 struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
378 u8 acknowledge_mode, unsigned int delay,
379 struct nci_dev *ndev);
380 int nci_spi_send(struct nci_spi *nspi,
381 struct completion *write_handshake_completion,
382 struct sk_buff *skb);
383 struct sk_buff *nci_spi_read(struct nci_spi *nspi);
385 #endif /* __NCI_CORE_H */